//
//  NSObject+KVO.h
//  KnowledgeHierarchy
//
//  Created by linyi on 2020/4/11.
//  Copyright © 2020年 linyi. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface NSObject (KVO)

- (void)LY_addObserver:(NSObject *)observer forKeyPath:(NSString *)keyPath options:(NSKeyValueObservingOptions)options context:(nullable void *)context;

@end
